toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> result = <String, dynamic>{};
result['first_name'] = firstName;
result['last_name'] = lastName;
result['company'] = company;
result['address_1'] = address1;
result['address_2'] = address2;
result['city'] = city;
result['state'] = state;
result['postcode'] = postcode;
result['country'] = country;
return result;
}